Savings Goal Calculator
Time to goal
2 yr 10 mo
34 monthly contributions.
Target on that date
$10,000
Inflation left at zero, so the target stays put.
You put in
$9,500
Everything you deposit, including today's balance.
Interest earns
$604
The part you did not have to earn.
Balance at the end
$10,104
Contributions plus interest.
Free and no sign-in. Results are estimates for planning, not financial advice; lenders and tax rules apply their own details.
A target without a timeline is a wish, and a timeline that ignores inflation is a smaller target than you think. This calculator answers both directions: how long the goal takes at what you can save, and how much each month a fixed deadline actually needs.
How it works
The calculator steps forward one month at a time. The balance earns interest for the month, then the contribution is added:
balance_next = balance × (1 + monthly rate) + contribution
Adding at the start of the month instead earns interest on that month’s contribution too, which is why the timing control changes the answer. Rates are converted from annual to monthly using the compounding you choose: a 5% account compounded daily earns slightly more than 5% ÷ 12 each month, and using the wrong conversion is the difference between a plan that lands and one that quietly comes up short.
With inflation above zero, the target is not fixed. $10,000 in today’s money is a larger number by the time you get there, so the calculator inflates the target as it goes — the balance must reach what the goal will cost, not what it costs now. This is the assumption most savings calculators leave out, and it is the one that matters for anything more than a couple of years away.
The second mode solves the same equation backwards: given a deadline, it finds the contribution that lands exactly on the inflated target. Both directions stop at 100 years rather than pretending an unreachable goal has a date.
Worked example
A target of $10,000, with $1,000 already saved, $250 added each month and a 4% annual return, no inflation:
- Time to goal: 34 months
- Your contributions: $9,500
- Interest earned: about $604
- Balance at the end: about $10,104
Now add 3% inflation. The goal becomes about $10,954 by the time you reach it, so the same plan takes 37 months, costs $10,250 in contributions, and $954 of the target exists only because prices moved.
In the other direction: to hit $10,000 in five years from the same starting point, at 4% with 3% inflation, you need $156.44 a month — not the $150 that dividing the shortfall by 60 suggests.
Working backwards from a deadline
The number a deadline produces is almost always larger than the one people have in mind, because dividing a target by the months ignores the fact that savings earn nothing for a while and then earn on their own interest. A $10,000 goal from zero, at a 4% return:
| Deadline | Per month at 4% | Per month at 0% | What interest pays |
|---|---|---|---|
| 1 year | $818 | $833 | $183 |
| 2 years | $401 | $417 | $379 |
| 5 years | $151 | $167 | $950 |
| 10 years | $68 | $83 | $1,851 |
The table is the case for starting early in one glance: the same target costs $818 a month over one year and $68 a month over ten, and interest pays $1,851 of the ten-year plan against $183 of the one-year plan. Extending the deadline is usually a bigger lever than finding a slightly better rate.
Three things worth deciding before you set the number:
- Which pot the goal lives in. A deposit in three years and a retirement in thirty are not the same account. Money needed soon belongs somewhere it cannot fall in value; money needed in decades can accept a return that moves.
- Whether the emergency fund exists first. A savings goal and an emergency fund are different jobs. Without three to six months of expenses set aside, the first unexpected bill empties the goal — which is why it is usually built first.
- What the target is actually for. A deposit is priced in tomorrow’s house prices, so inflation belongs in the calculation. A target that is a number you control — a fixed debt, a course fee you have already been quoted — does not move, and entering 0% inflation is the honest setting.
Questions people ask
- Should I enter a return before or after inflation?
- This calculator separates the two: enter the nominal rate the account pays and the inflation you expect, and it handles the rest. That is clearer than picking a "real" rate, because you can see how much of the timeline rests on each assumption and change one without touching the other.
- What contribution timing should I choose?
- At the start if you deposit on payday or by standing order on the 1st; at the end if the money leaves your account after the month's spending. The difference is one month of interest on each contribution — small monthly, real over decades.
- Does compounding frequency really change anything?
- A little, and in one direction: more frequent compounding earns more for the same quoted annual rate. On $10,000 at 4% over five years, monthly and daily compounding differ by a few dollars. Choose what your account actually does; do not pick the one with the bigger number.
- Why does the balance end above my target?
- The calculator works in whole months, so it stops on the first month the balance clears the target. That final contribution can push the balance past it. The overshoot is real money you would have, not a rounding error.
- What if I already have more than the target?
- The result is zero months and the balance you entered. Raise the target to plan the next goal, or switch to the deadline mode to see how much you can afford to draw down.
Written and checked by Joseph Kudomo-Abasi. Last checked 31 October 2026.
Sources